SteamVR displays an error message in the headset, that "the action manifest for SlicerApp-real was not found", despite json files copied to both directories
Slicer 5.3.0-2023-05-30\slicer.org\Extensions-31771\SlicerVirtualReality\share\vr_actions
and
Slicer 5.3.0-2023-05-30\

No controller input seems to be working.
Tested with version dec1acf (2023-05-31) and Slicer3D version 5.3.0-2023-05-30 r31771 / 99eb780

Screenshot: